package com.fengyunhe.common.qr;

import com.google.zxing.*;
import com.google.zxing.common.BitMatrix;
import com.google.zxing.common.HybridBinarizer;
import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;

import javax.imageio.ImageIO;
import java.awt.*;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.OutputStream;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

public class QrPicUtil
{

    private QrPicUtil()
    {
    }

    private static QrPicUtil instance = new QrPicUtil();


    public static QrPicUtil getInstance()
    {
        return instance;
    }

    /**
     * 给二维码图片添加Logo
     *
     * @param qrPic
     * @param logoPic
     */
    public void addLogo_QRCode(File qrPic, File logoPic, LogoConfig logoConfig)
    {
        try
        {
            List<String> list = new ArrayList<String>();

            if (!qrPic.isFile() || !logoPic.isFile())
            {
                System.out.print("file not find !");
                System.exit(0);
            }

            /**
             * 读取二维码图片，并构建绘图对象
             */
            BufferedImage image = ImageIO.read(qrPic);
            Graphics2D g = image.createGraphics();

            /**
             * 读取Logo图片
             */
            BufferedImage logo = ImageIO.read(logoPic);

            int widthLogo = image.getWidth() / logoConfig.getLogoPart(), heightLogo = image.getHeight() / logoConfig.getLogoPart();

            // 计算图片放置位置
            int x = (image.getWidth() - widthLogo) / 2;
            int y = (image.getHeight() - heightLogo) / 2;

            //开始绘制图片
            g.drawImage(logo, x, y, widthLogo, heightLogo, null);
            g.drawRoundRect(x, y, widthLogo, heightLogo, 15, 15);
            g.setStroke(new BasicStroke(logoConfig.getBorder()));
            g.setColor(logoConfig.getBorderColor());
            g.drawRect(x, y, widthLogo, heightLogo);

            g.dispose();

            ImageIO.write(image, "jpeg", new File("D:/newPic.jpg"));
        } catch (Exception e)
        {
            e.printStackTrace();
        }
    }

    /**
     * 二维码的解析
     *
     * @param file
     */
    public void parseQR_CODEImage(File file)
    {
        try
        {
            MultiFormatReader formatReader = new MultiFormatReader();

            // File file = new File(filePath);
            if (!file.exists())
            {
                return;
            }

            BufferedImage image = ImageIO.read(file);

            LuminanceSource source = new BufferedImageLuminanceSource(image);
            Binarizer binarizer = new HybridBinarizer(source);
            BinaryBitmap binaryBitmap = new BinaryBitmap(binarizer);

            Map hints = new HashMap();
            hints.put(EncodeHintType.CHARACTER_SET, "UTF-8");

            Result result = formatReader.decode(binaryBitmap, hints);

            System.out.println("result = " + result.toString());
            System.out.println("resultFormat = " + result.getBarcodeFormat());
            System.out.println("resultText = " + result.getText());
        } catch (Exception e)
        {
            e.printStackTrace();

        }
    }

    /**
     * 将二维码生成为文件
     *
     * @param bm
     * @param imageFormat
     * @param file
     */
    public void decodeQR_CODE2ImageFile(BitMatrix bm, String imageFormat, File file)
    {
        try
        {
            if (null == file || file.getName().trim().isEmpty())
            {
                throw new IllegalArgumentException("文件异常，或扩展名有问题！");
            }

            BufferedImage bi = fileToBufferedImage(bm);
            ImageIO.write(bi, "jpeg", file);
        } catch (Exception e)
        {
            e.printStackTrace();
        }
    }

    /**
     * 将二维码生成为输出流
     *
     * @param bm
     * @param imageFormat
     * @param os
     */
    public void decodeQR_CODE2OutputStream(BitMatrix bm, String imageFormat, OutputStream os)
    {
        try
        {
            BufferedImage image = fileToBufferedImage(bm);
            ImageIO.write(image, imageFormat, os);
        } catch (Exception e)
        {
            e.printStackTrace();
        }
    }

    /**
     * 构建初始化二维码
     *
     * @param bm
     * @return
     */
    public BufferedImage fileToBufferedImage(BitMatrix bm)
    {
        BufferedImage image = null;
        try
        {
            int w = bm.getWidth(), h = bm.getHeight();
            image = new BufferedImage(w, h, BufferedImage.TYPE_INT_RGB);

            for (int x = 0; x < w; x++)
            {
                for (int y = 0; y < h; y++)
                {
                    image.setRGB(x, y, bm.get(x, y) ? 0xFF000000 : 0xFFCCDDEE);
                }
            }

        } catch (Exception e)
        {
            e.printStackTrace();
        }
        return image;
    }

    /**
     * 生成二维码bufferedImage图片
     *
     * @param content       编码内容
     * @param barcodeFormat 编码类型
     * @param width         图片宽度
     * @param height        图片高度
     * @param hints         设置参数
     * @return
     */
    public BufferedImage getQR_CODEBufferedImage(String content, BarcodeFormat barcodeFormat, int width, int height, Map<EncodeHintType, ?> hints)
    {
        MultiFormatWriter multiFormatWriter = null;
        BitMatrix bm = null;
        BufferedImage image = null;
        try
        {
            multiFormatWriter = new MultiFormatWriter();
            // 参数顺序分别为：编码内容，编码类型，生成图片宽度，生成图片高度，设置参数
            bm = multiFormatWriter.encode(content, barcodeFormat, width, height, hints);

            int w = bm.getWidth();
            int h = bm.getHeight();
            image = new BufferedImage(w, h, BufferedImage.TYPE_INT_RGB);

            // 开始利用二维码数据创建Bitmap图片，分别设为黑（0xFFFFFFFF）白（0xFF000000）两色
            for (int x = 0; x < w; x++)
            {
                for (int y = 0; y < h; y++)
                {
                    image.setRGB(x, y, bm.get(x, y) ? 0xFF000000 : 0xFFFFFFFF);
                }
            }
        } catch (WriterException e)
        {
            e.printStackTrace();
        }
        return image;
    }

    /**
     * 设置二维码的格式参数
     *
     * @return
     */
    public Map<EncodeHintType, Object> getDecodeHintType()
    {
        // 用于设置QR二维码参数
        Map<EncodeHintType, Object> hints = new HashMap<EncodeHintType, Object>();
        // 设置QR二维码的纠错级别（H为最高级别）具体级别信息
        hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.L);
        // 设置编码方式
        hints.put(EncodeHintType.CHARACTER_SET, "utf-8");
//        hints.put(EncodeHintType.MAX_SIZE, 350);
//        hints.put(EncodeHintType.MIN_SIZE, 100);
        hints.put(EncodeHintType.MARGIN, 0);
        return hints;
    }

    static class LogoConfig
    {
        // logo默认边框颜色
        public static final Color DEFAULT_BORDERCOLOR = Color.WHITE;
        // logo默认边框宽度
        public static final int DEFAULT_BORDER = 2;
        // logo大小默认为照片的1/5
        public static final int DEFAULT_LOGOPART = 5;

        private final int border = DEFAULT_BORDER;
        private final Color borderColor;
        private final int logoPart;


        public LogoConfig()
        {
            this(DEFAULT_BORDERCOLOR, DEFAULT_LOGOPART);
        }

        public LogoConfig(Color borderColor, int logoPart)
        {
            this.borderColor = borderColor;
            this.logoPart = logoPart;
        }

        public Color getBorderColor()
        {
            return borderColor;
        }

        public int getBorder()
        {
            return border;
        }

        public int getLogoPart()
        {
            return logoPart;
        }
    }

}


